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Diffstat (limited to 'lib/Target/X86/X86ISelDAGToDAG.cpp')
-rw-r--r--lib/Target/X86/X86ISelDAGToDAG.cpp200
1 files changed, 107 insertions, 93 deletions
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index c5234413aba6..9b0ec6e123fe 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -190,20 +190,19 @@ namespace {
SDNode *SelectAtomic64(SDNode *Node, unsigned Opc);
SDNode *SelectAtomicLoadAdd(SDNode *Node, EVT NVT);
- bool MatchSegmentBaseAddress(SDValue N, X86ISelAddressMode &AM);
- bool MatchLoad(SDValue N, X86ISelAddressMode &AM);
+ bool MatchLoadInAddress(LoadSDNode *N, X86ISelAddressMode &AM);
bool MatchWrapper(SDValue N, X86ISelAddressMode &AM);
bool MatchAddress(SDValue N, X86ISelAddressMode &AM);
bool MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
unsigned Depth);
bool MatchAddressBase(SDValue N, X86ISelAddressMode &AM);
- bool SelectAddr(SDNode *Op, SDValue N, SDValue &Base,
+ bool SelectAddr(SDNode *Parent, SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index, SDValue &Disp,
SDValue &Segment);
- bool SelectLEAAddr(SDNode *Op, SDValue N, SDValue &Base,
+ bool SelectLEAAddr(SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index, SDValue &Disp,
SDValue &Segment);
- bool SelectTLSADDRAddr(SDNode *Op, SDValue N, SDValue &Base,
+ bool SelectTLSADDRAddr(SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index, SDValue &Disp,
SDValue &Segment);
bool SelectScalarSSELoad(SDNode *Root, SDValue N,
@@ -264,12 +263,6 @@ namespace {
return CurDAG->getTargetConstant(Imm, MVT::i8);
}
- /// getI16Imm - Return a target constant with the specified value, of type
- /// i16.
- inline SDValue getI16Imm(unsigned Imm) {
- return CurDAG->getTargetConstant(Imm, MVT::i16);
- }
-
/// getI32Imm - Return a target constant with the specified value, of type
/// i32.
inline SDValue getI32Imm(unsigned Imm) {
@@ -511,10 +504,11 @@ void X86DAGToDAGISel::PreprocessISelDAG() {
// FIXME: optimize the case where the src/dest is a load or store?
SDValue Store = CurDAG->getTruncStore(CurDAG->getEntryNode(), dl,
N->getOperand(0),
- MemTmp, NULL, 0, MemVT,
+ MemTmp, MachinePointerInfo(), MemVT,
false, false, 0);
- SDValue Result = CurDAG->getExtLoad(ISD::EXTLOAD, DstVT, dl, Store, MemTmp,
- NULL, 0, MemVT, false, false, 0);
+ SDValue Result = CurDAG->getExtLoad(ISD::EXTLOAD, dl, DstVT, Store, MemTmp,
+ MachinePointerInfo(),
+ MemVT, false, false, 0);
// We're about to replace all uses of the FP_ROUND/FP_EXTEND with the
// extload we created. This will cause general havok on the dag because
@@ -536,9 +530,12 @@ void X86DAGToDAGISel::PreprocessISelDAG() {
void X86DAGToDAGISel::EmitSpecialCodeForMain(MachineBasicBlock *BB,
MachineFrameInfo *MFI) {
const TargetInstrInfo *TII = TM.getInstrInfo();
- if (Subtarget->isTargetCygMing())
+ if (Subtarget->isTargetCygMing()) {
+ unsigned CallOp =
+ Subtarget->is64Bit() ? X86::WINCALL64pcrel32 : X86::CALLpcrel32;
BuildMI(BB, DebugLoc(),
- TII->get(X86::CALLpcrel32)).addExternalSymbol("__main");
+ TII->get(CallOp)).addExternalSymbol("__main");
+ }
}
void X86DAGToDAGISel::EmitFunctionEntryCode() {
@@ -549,29 +546,27 @@ void X86DAGToDAGISel::EmitFunctionEntryCode() {
}
-bool X86DAGToDAGISel::MatchSegmentBaseAddress(SDValue N,
- X86ISelAddressMode &AM) {
- assert(N.getOpcode() == X86ISD::SegmentBaseAddress);
- SDValue Segment = N.getOperand(0);
-
- if (AM.Segment.getNode() == 0) {
- AM.Segment = Segment;
- return false;
- }
-
- return true;
-}
-
-bool X86DAGToDAGISel::MatchLoad(SDValue N, X86ISelAddressMode &AM) {
+bool X86DAGToDAGISel::MatchLoadInAddress(LoadSDNode *N, X86ISelAddressMode &AM){
+ SDValue Address = N->getOperand(1);
+
+ // load gs:0 -> GS segment register.
+ // load fs:0 -> FS segment register.
+ //
// This optimization is valid because the GNU TLS model defines that
// gs:0 (or fs:0 on X86-64) contains its own address.
// For more information see http://people.redhat.com/drepper/tls.pdf
-
- SDValue Address = N.getOperand(1);
- if (Address.getOpcode() == X86ISD::SegmentBaseAddress &&
- !MatchSegmentBaseAddress (Address, AM))
- return false;
-
+ if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Address))
+ if (C->getSExtValue() == 0 && AM.Segment.getNode() == 0 &&
+ Subtarget->isTargetELF())
+ switch (N->getPointerInfo().getAddrSpace()) {
+ case 256:
+ AM.Segment = CurDAG->getRegister(X86::GS, MVT::i16);
+ return false;
+ case 257:
+ AM.Segment = CurDAG->getRegister(X86::FS, MVT::i16);
+ return false;
+ }
+
return true;
}
@@ -690,25 +685,6 @@ bool X86DAGToDAGISel::MatchAddress(SDValue N, X86ISelAddressMode &AM) {
return false;
}
-/// isLogicallyAddWithConstant - Return true if this node is semantically an
-/// add of a value with a constantint.
-static bool isLogicallyAddWithConstant(SDValue V, SelectionDAG *CurDAG) {
- // Check for (add x, Cst)
- if (V->getOpcode() == ISD::ADD)
- return isa<ConstantSDNode>(V->getOperand(1));
-
- // Check for (or x, Cst), where Cst & x == 0.
- if (V->getOpcode() != ISD::OR ||
- !isa<ConstantSDNode>(V->getOperand(1)))
- return false;
-
- // Handle "X | C" as "X + C" iff X is known to have C bits clear.
- ConstantSDNode *CN = cast<ConstantSDNode>(V->getOperand(1));
-
- // Check to see if the LHS & C is zero.
- return CurDAG->MaskedValueIsZero(V->getOperand(0), CN->getAPIntValue());
-}
-
bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
unsigned Depth) {
bool is64Bit = Subtarget->is64Bit();
@@ -756,11 +732,6 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
break;
}
- case X86ISD::SegmentBaseAddress:
- if (!MatchSegmentBaseAddress(N, AM))
- return false;
- break;
-
case X86ISD::Wrapper:
case X86ISD::WrapperRIP:
if (!MatchWrapper(N, AM))
@@ -768,7 +739,7 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
break;
case ISD::LOAD:
- if (!MatchLoad(N, AM))
+ if (!MatchLoadInAddress(cast<LoadSDNode>(N), AM))
return false;
break;
@@ -799,7 +770,7 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
// Okay, we know that we have a scale by now. However, if the scaled
// value is an add of something and a constant, we can fold the
// constant into the disp field here.
- if (isLogicallyAddWithConstant(ShVal, CurDAG)) {
+ if (CurDAG->isBaseWithConstantOffset(ShVal)) {
AM.IndexReg = ShVal.getNode()->getOperand(0);
ConstantSDNode *AddVal =
cast<ConstantSDNode>(ShVal.getNode()->getOperand(1));
@@ -943,24 +914,18 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
// Add an artificial use to this node so that we can keep track of
// it if it gets CSE'd with a different node.
HandleSDNode Handle(N);
- SDValue LHS = Handle.getValue().getNode()->getOperand(0);
- SDValue RHS = Handle.getValue().getNode()->getOperand(1);
X86ISelAddressMode Backup = AM;
- if (!MatchAddressRecursively(LHS, AM, Depth+1) &&
- !MatchAddressRecursively(RHS, AM, Depth+1))
+ if (!MatchAddressRecursively(N.getOperand(0), AM, Depth+1) &&
+ !MatchAddressRecursively(Handle.getValue().getOperand(1), AM, Depth+1))
return false;
AM = Backup;
- LHS = Handle.getValue().getNode()->getOperand(0);
- RHS = Handle.getValue().getNode()->getOperand(1);
-
+
// Try again after commuting the operands.
- if (!MatchAddressRecursively(RHS, AM, Depth+1) &&
- !MatchAddressRecursively(LHS, AM, Depth+1))
+ if (!MatchAddressRecursively(Handle.getValue().getOperand(1), AM, Depth+1)&&
+ !MatchAddressRecursively(Handle.getValue().getOperand(0), AM, Depth+1))
return false;
AM = Backup;
- LHS = Handle.getValue().getNode()->getOperand(0);
- RHS = Handle.getValue().getNode()->getOperand(1);
// If we couldn't fold both operands into the address at the same time,
// see if we can just put each operand into a register and fold at least
@@ -968,17 +933,19 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
if (AM.BaseType == X86ISelAddressMode::RegBase &&
!AM.Base_Reg.getNode() &&
!AM.IndexReg.getNode()) {
- AM.Base_Reg = LHS;
- AM.IndexReg = RHS;
+ N = Handle.getValue();
+ AM.Base_Reg = N.getOperand(0);
+ AM.IndexReg = N.getOperand(1);
AM.Scale = 1;
return false;
}
+ N = Handle.getValue();
break;
}
case ISD::OR:
// Handle "X | C" as "X + C" iff X is known to have C bits clear.
- if (isLogicallyAddWithConstant(N, CurDAG)) {
+ if (CurDAG->isBaseWithConstantOffset(N)) {
X86ISelAddressMode Backup = AM;
ConstantSDNode *CN = cast<ConstantSDNode>(N.getOperand(1));
uint64_t Offset = CN->getSExtValue();
@@ -1148,10 +1115,30 @@ bool X86DAGToDAGISel::MatchAddressBase(SDValue N, X86ISelAddressMode &AM) {
/// SelectAddr - returns true if it is able pattern match an addressing mode.
/// It returns the operands which make up the maximal addressing mode it can
/// match by reference.
-bool X86DAGToDAGISel::SelectAddr(SDNode *Op, SDValue N, SDValue &Base,
+///
+/// Parent is the parent node of the addr operand that is being matched. It
+/// is always a load, store, atomic node, or null. It is only null when
+/// checking memory operands for inline asm nodes.
+bool X86DAGToDAGISel::SelectAddr(SDNode *Parent, SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index,
SDValue &Disp, SDValue &Segment) {
X86ISelAddressMode AM;
+
+ if (Parent &&
+ // This list of opcodes are all the nodes that have an "addr:$ptr" operand
+ // that are not a MemSDNode, and thus don't have proper addrspace info.
+ Parent->getOpcode() != ISD::INTRINSIC_W_CHAIN && // unaligned loads, fixme
+ Parent->getOpcode() != ISD::INTRINSIC_VOID && // nontemporal stores
+ Parent->getOpcode() != X86ISD::TLSCALL) { // Fixme
+ unsigned AddrSpace =
+ cast<MemSDNode>(Parent)->getPointerInfo().getAddrSpace();
+ // AddrSpace 256 -> GS, 257 -> FS.
+ if (AddrSpace == 256)
+ AM.Segment = CurDAG->getRegister(X86::GS, MVT::i16);
+ if (AddrSpace == 257)
+ AM.Segment = CurDAG->getRegister(X86::FS, MVT::i16);
+ }
+
if (MatchAddress(N, AM))
return false;
@@ -1187,7 +1174,7 @@ bool X86DAGToDAGISel::SelectScalarSSELoad(SDNode *Root,
IsProfitableToFold(N.getOperand(0), N.getNode(), Root) &&
IsLegalToFold(N.getOperand(0), N.getNode(), Root, OptLevel)) {
LoadSDNode *LD = cast<LoadSDNode>(PatternNodeWithChain);
- if (!SelectAddr(Root, LD->getBasePtr(), Base, Scale, Index, Disp,Segment))
+ if (!SelectAddr(LD, LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
return false;
return true;
}
@@ -1205,7 +1192,7 @@ bool X86DAGToDAGISel::SelectScalarSSELoad(SDNode *Root,
IsLegalToFold(N.getOperand(0), N.getNode(), Root, OptLevel)) {
// Okay, this is a zero extending load. Fold it.
LoadSDNode *LD = cast<LoadSDNode>(N.getOperand(0).getOperand(0));
- if (!SelectAddr(Root, LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
+ if (!SelectAddr(LD, LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
return false;
PatternNodeWithChain = SDValue(LD, 0);
return true;
@@ -1216,7 +1203,7 @@ bool X86DAGToDAGISel::SelectScalarSSELoad(SDNode *Root,
/// SelectLEAAddr - it calls SelectAddr and determines if the maximal addressing
/// mode it matches can be cost effectively emitted as an LEA instruction.
-bool X86DAGToDAGISel::SelectLEAAddr(SDNode *Op, SDValue N,
+bool X86DAGToDAGISel::SelectLEAAddr(SDValue N,
SDValue &Base, SDValue &Scale,
SDValue &Index, SDValue &Disp,
SDValue &Segment) {
@@ -1278,7 +1265,7 @@ bool X86DAGToDAGISel::SelectLEAAddr(SDNode *Op, SDValue N,
}
/// SelectTLSADDRAddr - This is only run on TargetGlobalTLSAddress nodes.
-bool X86DAGToDAGISel::SelectTLSADDRAddr(SDNode *Op, SDValue N, SDValue &Base,
+bool X86DAGToDAGISel::SelectTLSADDRAddr(SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index,
SDValue &Disp, SDValue &Segment) {
assert(N.getOpcode() == ISD::TargetGlobalTLSAddress);
@@ -1311,7 +1298,8 @@ bool X86DAGToDAGISel::TryFoldLoad(SDNode *P, SDValue N,
!IsLegalToFold(N, P, P, OptLevel))
return false;
- return SelectAddr(P, N.getOperand(1), Base, Scale, Index, Disp, Segment);
+ return SelectAddr(N.getNode(),
+ N.getOperand(1), Base, Scale, Index, Disp, Segment);
}
/// getGlobalBaseReg - Return an SDNode that returns the value of
@@ -1329,7 +1317,7 @@ SDNode *X86DAGToDAGISel::SelectAtomic64(SDNode *Node, unsigned Opc) {
SDValue In2L = Node->getOperand(2);
SDValue In2H = Node->getOperand(3);
SDValue Tmp0, Tmp1, Tmp2, Tmp3, Tmp4;
- if (!SelectAddr(In1.getNode(), In1, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
+ if (!SelectAddr(Node, In1, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
return NULL;
MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
MemOp[0] = cast<MemSDNode>(Node)->getMemOperand();
@@ -1355,7 +1343,7 @@ SDNode *X86DAGToDAGISel::SelectAtomicLoadAdd(SDNode *Node, EVT NVT) {
SDValue Ptr = Node->getOperand(1);
SDValue Val = Node->getOperand(2);
SDValue Tmp0, Tmp1, Tmp2, Tmp3, Tmp4;
- if (!SelectAddr(Ptr.getNode(), Ptr, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
+ if (!SelectAddr(Node, Ptr, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
return 0;
bool isInc = false, isDec = false, isSub = false, isCN = false;
@@ -1592,7 +1580,32 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
return RetVal;
break;
}
-
+ case X86ISD::UMUL: {
+ SDValue N0 = Node->getOperand(0);
+ SDValue N1 = Node->getOperand(1);
+
+ unsigned LoReg;
+ switch (NVT.getSimpleVT().SimpleTy) {
+ default: llvm_unreachable("Unsupported VT!");
+ case MVT::i8: LoReg = X86::AL; Opc = X86::MUL8r; break;
+ case MVT::i16: LoReg = X86::AX; Opc = X86::MUL16r; break;
+ case MVT::i32: LoReg = X86::EAX; Opc = X86::MUL32r; break;
+ case MVT::i64: LoReg = X86::RAX; Opc = X86::MUL64r; break;
+ }
+
+ SDValue InFlag = CurDAG->getCopyToReg(CurDAG->getEntryNode(), dl, LoReg,
+ N0, SDValue()).getValue(1);
+
+ SDVTList VTs = CurDAG->getVTList(NVT, NVT, MVT::i32);
+ SDValue Ops[] = {N1, InFlag};
+ SDNode *CNode = CurDAG->getMachineNode(Opc, dl, VTs, Ops, 2);
+
+ ReplaceUses(SDValue(Node, 0), SDValue(CNode, 0));
+ ReplaceUses(SDValue(Node, 1), SDValue(CNode, 1));
+ ReplaceUses(SDValue(Node, 2), SDValue(CNode, 2));
+ return NULL;
+ }
+
case ISD::SMUL_LOHI:
case ISD::UMUL_LOHI: {
SDValue N0 = Node->getOperand(0);
@@ -1642,14 +1655,15 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
SDValue Ops[] = { Tmp0, Tmp1, Tmp2, Tmp3, Tmp4, N1.getOperand(0),
InFlag };
SDNode *CNode =
- CurDAG->getMachineNode(MOpc, dl, MVT::Other, MVT::Flag, Ops,
+ CurDAG->getMachineNode(MOpc, dl, MVT::Other, MVT::Glue, Ops,
array_lengthof(Ops));
InFlag = SDValue(CNode, 1);
+
// Update the chain.
ReplaceUses(N1.getValue(1), SDValue(CNode, 0));
} else {
- InFlag =
- SDValue(CurDAG->getMachineNode(Opc, dl, MVT::Flag, N1, InFlag), 0);
+ SDNode *CNode = CurDAG->getMachineNode(Opc, dl, MVT::Glue, N1, InFlag);
+ InFlag = SDValue(CNode, 0);
}
// Prevent use of AH in a REX instruction by referencing AX instead.
@@ -1688,7 +1702,7 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
ReplaceUses(SDValue(Node, 1), Result);
DEBUG(dbgs() << "=> "; Result.getNode()->dump(CurDAG); dbgs() << '\n');
}
-
+
return NULL;
}
@@ -1773,7 +1787,7 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
if (isSigned && !signBitIsZero) {
// Sign extend the low part into the high part.
InFlag =
- SDValue(CurDAG->getMachineNode(SExtOpcode, dl, MVT::Flag, InFlag),0);
+ SDValue(CurDAG->getMachineNode(SExtOpcode, dl, MVT::Glue, InFlag),0);
} else {
// Zero out the high part, effectively zero extending the input.
SDValue ClrNode =
@@ -1787,14 +1801,14 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
SDValue Ops[] = { Tmp0, Tmp1, Tmp2, Tmp3, Tmp4, N1.getOperand(0),
InFlag };
SDNode *CNode =
- CurDAG->getMachineNode(MOpc, dl, MVT::Other, MVT::Flag, Ops,
+ CurDAG->getMachineNode(MOpc, dl, MVT::Other, MVT::Glue, Ops,
array_lengthof(Ops));
InFlag = SDValue(CNode, 1);
// Update the chain.
ReplaceUses(N1.getValue(1), SDValue(CNode, 0));
} else {
InFlag =
- SDValue(CurDAG->getMachineNode(Opc, dl, MVT::Flag, N1, InFlag), 0);
+ SDValue(CurDAG->getMachineNode(Opc, dl, MVT::Glue, N1, InFlag), 0);
}
// Prevent use of AH in a REX instruction by referencing AX instead.
@@ -1971,7 +1985,7 @@ SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode,
case 'v': // not offsetable ??
default: return true;
case 'm': // memory
- if (!SelectAddr(Op.getNode(), Op, Op0, Op1, Op2, Op3, Op4))
+ if (!SelectAddr(0, Op, Op0, Op1, Op2, Op3, Op4))
return true;
break;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-24 05:58:14 +0000